pushtransaction and concurent.futures doesn't work. about eospy HOT 3 CLOSED

import eospy.cleos
import concurrent.futures
import time


ce = eospy.cleos.Cleos(url='http://api.pennstation.eosnewyork.io:7001')


def send_tx():
    arguments = {
        "from": "eosio",  # sender
        "to": "bob123451234",  # receiver
        "quantity": '0.1000 EOS',  # In EOS
        "memo": "this is fake names",
    }

    payload = {
        "account": "eosio.token",
        "name": "transfer",
        "authorization": [{
            "actor": "eosio",
            "permission": "active",
        }],
    }

    # Converting payload to binary
    data = ce.abi_json_to_bin(
        payload['account'], payload['name'], arguments)

    # Inserting payload binary form as "data" field in original payload
    payload['data'] = data['binargs']

    # final transaction formed
    trx = {"actions": [payload]}

    # trx['expiration'] = str(
    #     (dt.datetime.utcnow() + dt.timedelta(seconds=60)).replace(tzinfo=pytz.UTC))
    # use a string or EOSKey for push_transaction

    key = "some key"
    resp = ce.push_transaction(trx, key, broadcast=True)
    return resp


def main():
    t0 = time.time()
    with concurrent.futures.ThreadPoolExecutor(max_workers=4) as executor:
        futures = [executor.submit(send_tx) for _ in range(4)]

        for trx in concurrent.futures.as_completed(futures):
            try:
                data = trx.result()
            except Exception as e:
                print(f'exception: {e}')
            else:
                print(data)

    t1 = time.time()

    print(f'duration: {t1 - t0}')


if __name__ == "__main__":
    main()

{'transaction_id': '0f7d85fb37dbe34c5b1c3d90ed6bea6eafa17aadb3af8ae4ba32b92c6f49f24c', 'processed': {'id': '0f7d85fb37dbe34c5b1c3d90ed6bea6eafa17aadb3af8ae4ba32b92c6f49f24c', 'block_num': 569, 'block_time': '2019-03-04T14:28:29.500', 'producer_block_id': None, 'receipt': {'status': 'executed', 'cpu_usage_us': 602, 'net_usage_words': 18}, 'elapsed': 602, 'net_usage': 144, 'scheduled': False, 'action_traces': [{'receipt': {'receiver': 'eosio.token', 'act_digest': 'c7e0251d1e15c1f19d3917525ae422bc70f3fe191a45782aa1dbb5c81b352905', 'global_sequence': 903, 'recv_sequence': 58, 'auth_sequence': [['eosio', 810]], 'code_sequence': 1, 'abi_sequence': 1}, 'act': {'account': 'eosio.token', 'name': 'transfer', 'authorization': [{'actor': 'eosio', 'permission': 'active'}], 'data': {'from': 'eosio', 'to': 'bob123451234', 'quantity': '0.1000 EOS', 'memo': 'this is fake names'}, 'hex_data': '0000000000ea3055408608850c110e3de80300000000000004454f530000000012746869732069732066616b65206e616d6573'}, 'context_free': False, 'elapsed': 336, 'console': '', 'trx_id': '0f7d85fb37dbe34c5b1c3d90ed6bea6eafa17aadb3af8ae4ba32b92c6f49f24c', 'block_num': 569, 'block_time': '2019-03-04T14:28:29.500', 'producer_block_id': None, 'account_ram_deltas': [], 'except': None, 'inline_traces': [{'receipt': {'receiver': 'eosio', 'act_digest': 'c7e0251d1e15c1f19d3917525ae422bc70f3fe191a45782aa1dbb5c81b352905', 'global_sequence': 904, 'recv_sequence': 735, 'auth_sequence': [['eosio', 811]], 'code_sequence': 1, 'abi_sequence': 1}, 'act': {'account': 'eosio.token', 'name': 'transfer', 'authorization': [{'actor': 'eosio', 'permission': 'active'}], 'data': {'from': 'eosio', 'to': 'bob123451234', 'quantity': '0.1000 EOS', 'memo': 'this is fake names'}, 'hex_data': '0000000000ea3055408608850c110e3de80300000000000004454f530000000012746869732069732066616b65206e616d6573'}, 'context_free': False, 'elapsed': 19, 'console': '', 'trx_id': '0f7d85fb37dbe34c5b1c3d90ed6bea6eafa17aadb3af8ae4ba32b92c6f49f24c', 'block_num': 569, 'block_time': '2019-03-04T14:28:29.500', 'producer_block_id': None, 'account_ram_deltas': [], 'except': None, 'inline_traces': []}, {'receipt': {'receiver': 'bob123451234', 'act_digest': 'c7e0251d1e15c1f19d3917525ae422bc70f3fe191a45782aa1dbb5c81b352905', 'global_sequence': 905, 'recv_sequence': 6, 'auth_sequence': [['eosio', 812]], 'code_sequence': 1, 'abi_sequence': 1}, 'act': {'account': 'eosio.token', 'name': 'transfer', 'authorization': [{'actor': 'eosio', 'permission': 'active'}], 'data': {'from': 'eosio', 'to': 'bob123451234', 'quantity': '0.1000 EOS', 'memo': 'this is fake names'}, 'hex_data': '0000000000ea3055408608850c110e3de80300000000000004454f530000000012746869732069732066616b65206e616d6573'}, 'context_free': False, 'elapsed': 6, 'console': '', 'trx_id': '0f7d85fb37dbe34c5b1c3d90ed6bea6eafa17aadb3af8ae4ba32b92c6f49f24c', 'block_num': 569, 'block_time': '2019-03-04T14:28:29.500', 'producer_block_id': None, 'account_ram_deltas': [], 'except': None, 'inline_traces': []}]}], 'except': None}}
{'transaction_id': '5dda72c4c08387cb3e00da9f961375af4a0062a615468080de9ad7cad43769fa', 'processed': {'id': '5dda72c4c08387cb3e00da9f961375af4a0062a615468080de9ad7cad43769fa', 'block_num': 569, 'block_time': '2019-03-04T14:28:29.500', 'producer_block_id': None, 'receipt': {'status': 'executed', 'cpu_usage_us': 592, 'net_usage_words': 18}, 'elapsed': 592, 'net_usage': 144, 'scheduled': False, 'action_traces': [{'receipt': {'receiver': 'eosio.token', 'act_digest': 'c7e0251d1e15c1f19d3917525ae422bc70f3fe191a45782aa1dbb5c81b352905', 'global_sequence': 906, 'recv_sequence': 59, 'auth_sequence': [['eosio', 813]], 'code_sequence': 1, 'abi_sequence': 1}, 'act': {'account': 'eosio.token', 'name': 'transfer', 'authorization': [{'actor': 'eosio', 'permission': 'active'}], 'data': {'from': 'eosio', 'to': 'bob123451234', 'quantity': '0.1000 EOS', 'memo': 'this is fake names'}, 'hex_data': '0000000000ea3055408608850c110e3de80300000000000004454f530000000012746869732069732066616b65206e616d6573'}, 'context_free': False, 'elapsed': 311, 'console': '', 'trx_id': '5dda72c4c08387cb3e00da9f961375af4a0062a615468080de9ad7cad43769fa', 'block_num': 569, 'block_time': '2019-03-04T14:28:29.500', 'producer_block_id': None, 'account_ram_deltas': [], 'except': None, 'inline_traces': [{'receipt': {'receiver': 'eosio', 'act_digest': 'c7e0251d1e15c1f19d3917525ae422bc70f3fe191a45782aa1dbb5c81b352905', 'global_sequence': 907, 'recv_sequence': 736, 'auth_sequence': [['eosio', 814]], 'code_sequence': 1, 'abi_sequence': 1}, 'act': {'account': 'eosio.token', 'name': 'transfer', 'authorization': [{'actor': 'eosio', 'permission': 'active'}], 'data': {'from': 'eosio', 'to': 'bob123451234', 'quantity': '0.1000 EOS', 'memo': 'this is fake names'}, 'hex_data': '0000000000ea3055408608850c110e3de80300000000000004454f530000000012746869732069732066616b65206e616d6573'}, 'context_free': False, 'elapsed': 19, 'console': '', 'trx_id': '5dda72c4c08387cb3e00da9f961375af4a0062a615468080de9ad7cad43769fa', 'block_num': 569, 'block_time': '2019-03-04T14:28:29.500', 'producer_block_id': None, 'account_ram_deltas': [], 'except': None, 'inline_traces': []}, {'receipt': {'receiver': 'bob123451234', 'act_digest': 'c7e0251d1e15c1f19d3917525ae422bc70f3fe191a45782aa1dbb5c81b352905', 'global_sequence': 908, 'recv_sequence': 7, 'auth_sequence': [['eosio', 815]], 'code_sequence': 1, 'abi_sequence': 1}, 'act': {'account': 'eosio.token', 'name': 'transfer', 'authorization': [{'actor': 'eosio', 'permission': 'active'}], 'data': {'from': 'eosio', 'to': 'bob123451234', 'quantity': '0.1000 EOS', 'memo': 'this is fake names'}, 'hex_data': '0000000000ea3055408608850c110e3de80300000000000004454f530000000012746869732069732066616b65206e616d6573'}, 'context_free': False, 'elapsed': 5, 'console': '', 'trx_id': '5dda72c4c08387cb3e00da9f961375af4a0062a615468080de9ad7cad43769fa', 'block_num': 569, 'block_time': '2019-03-04T14:28:29.500', 'producer_block_id': None, 'account_ram_deltas': [], 'except': None, 'inline_traces': []}]}], 'except': None}}
exception: Error: {'code': 409, 'message': 'Conflict', 'error': {'code': 3040008, 'name': 'tx_duplicate', 'what': 'Duplicate transaction', 'details': [{'message': 'duplicate transaction 0f7d85fb37dbe34c5b1c3d90ed6bea6eafa17aadb3af8ae4ba32b92c6f49f24c', 'file': 'producer_plugin.cpp', 'line_number': 392, 'method': 'on_incoming_transaction_async'}]}}
exception: Error: {'code': 409, 'message': 'Conflict', 'error': {'code': 3040008, 'name': 'tx_duplicate', 'what': 'Duplicate transaction', 'details': [{'message': 'duplicate transaction 0f7d85fb37dbe34c5b1c3d90ed6bea6eafa17aadb3af8ae4ba32b92c6f49f24c', 'file': 'producer_plugin.cpp', 'line_number': 392, 'method': 'on_incoming_transaction_async'}]}}
duration: 3.1731653213500977